Add documentation for parameter packs #174
Conversation
Confirmed the code examples here and in SE-0399 work as of Swift 5.9 (swiftlang-5.9.0.120.7)
Co-authored-by: Holly Borla <[email protected]>
| the `repeat` operator must appear first. | ||
| (So `repeat try each foo` or `repeat each try foo`) | ||
|
|
||
| - All of the `each` expressions in a parameter-pack expression |
There was a problem hiding this comment.
I'm having a similar reaction to the hyphen in parameter-pack here, but am starting to wonder whether this is just my lack of familiarity with our formal documentation and this is some convention in certain circumstances? Because I am not seeing the hyphen used in parameter-pack elsewhere in this PR.
There was a problem hiding this comment.
In these cases 'parameter pack' is being used as a compound adjective, so it should be hyphenated. My favorite case is something like 'drag and drop' vs. 'drag-and-drop operation': https://support.apple.com/guide/applestyleguide/d-apsg7af4f5d0/1.0/web/1.0#:~:text=drag-and-drop
There was a problem hiding this comment.
I think what's strange here is the overall term "parameter-pack expression". We should call it the "pattern expression".
There was a problem hiding this comment.
(No opinion here either way, but there might be confusion with this other meaning of pattern: https://docs.swift.org/swift-book/documentation/the-swift-programming-language/patterns , although 'pattern expression' isn't used in that context. Edit: That chapter does have 'expression pattern'.)
| the whole line is duplicated once for each type. | ||
| When you use `repeat` in the middle of a line (as an expression), | ||
| it expands to make a tuple | ||
| with one tuple element for each type. |
There was a problem hiding this comment.
Hmm... only if you have done so within tuple parentheses?
Cherry-picked from swiftlang#206
Removed stray whitespace at end of lines. Restored line breaks for unchanged content. Split lines in new content at clause and sentence boundaries, instead of wrapping at 80 columns.
simanerush
force-pushed
the
pack_102835487
branch
3 times, most recently
from
d2a7c35 to
be77ed9
Compare
simanerush
force-pushed
the
pack_102835487
branch
from
be77ed9 to
6c2cd8f
Compare
Fixes: rdar://102835487